Question

friction always ex
ample
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Answer 1

A smooth surface has smaller hills and valleys. There are also electrostatic attractions between surfaces, but these are weaker than the physical barriers to sliding. Liquids such as water and oil reduce friction because they keep the two surfaces from contacting each other.

Answer 2

Explanation:

friction always acts in an opposite direction in which the force act

Example - A boy riding a bicycle when stops paddling it comes to rest due to friction

hope it helps ✌